Cita APA (7th ed.)
Hartmann, D. (1974). Volksinitiativen.
Cita Chicago (17th ed.)
Hartmann, Dieter-Dirk. Volksinitiativen. Tübingen, 1974.
Cita MLA (9th ed.)
Hartmann, Dieter-Dirk. Volksinitiativen. 1974.
Atenció: Aquestes cites poden no estar 100% correctes.